IL4 and infection: As expected from our earlier studies, IFN-γ applied to BALB/c mice for the first 5 days of infection resulted in stronger Th2/1 hybrid responses, evident in the more prominent IFN-γ production and diminished IL-4 expression of GATA-3+ T cells isolated from IFN-γ treated mice at day 6 post infection (Fig. 4A).